Geared motor

ABSTRACT

A geared motor includes a gear unit having a first intermediate shaft, an input shaft and an output shaft. The gear unit has two connection surfaces set apart from each other to which a device to be driven by the gear unit is connectable to the gear unit, each connection surface having a drilling pattern. The housing part is asymmetrical such that the plane whose normal direction is aligned in parallel with the axis of rotation of the first intermediate shaft and includes the axis of rotation of the input shaft, is no plane of symmetry in relation to the entire outer surface of the housing part and also no plane of symmetry in relation to the housing wall of the housing part. The plane is a plane of symmetry with regard to the two connection surfaces together with their drilling patterns.

FIELD OF THE INVENTION

The present invention relates to a geared motor.

BACKGROUND INFORMATION

In a conventional die casting method for the production of metallicparts, sliders are moved in a linear manner, i.e., pulled out, duringthe demolding.

SUMMARY

Example embodiments of the present invention provide a geared motorhaving a compact form.

According to an example embodiment of the present invention, a gearedmotor has a gear unit, in particular a bevel gear unit, which is able tobe driven by an electric motor. The gear unit has a first intermediateshaft rotatably mounted with the aid of bearings in the housing part,and an input shaft, in particular, and an output shaft. The housing parthas an asymmetrical configuration such that the particular plane whosenormal direction is aligned in parallel with the axis of rotation of thefirst intermediate shaft and includes the axis of rotation of the inputshaft is no plane of symmetry in relation to the entire outer surface ofthe housing part and also no plane of symmetry in relation to thehousing wall of the housing part. The plane, however, is a plane ofsymmetry with regard to the two connection surfaces together with theirdrilling patterns, the output shaft in particular being situated inparallel with the first intermediate shaft.

This offers the advantage that the housing part is able to be placedtightly around the toothed parts and the gear unit can therefore have acompact configuration. In addition, only a small interior volume spacethus has to be provided in the gear unit. Nevertheless, the same deviceis able to be connected on the output side at both connection surfacesin each case. This is so because the drilling patterns of the twoconnection surfaces are arranged in mutual symmetry, with the resultthat the device to be connected is able to be connected to bothconnection surfaces in the same manner.

The connection surfaces are aligned in parallel with each other and inparallel with the plane of symmetry.

Additional characteristics of the mechanical interfaces achieved withthe aid of the two connection surfaces are also arranged in the samemanner. For example, the two connection surfaces include centeringdevice(s) such as a centering collar or centering edge, which are alsoarranged in symmetry with each other. The output-side centering of therespective device to be driven thus also is arranged and/or provided ina symmetrical fashion.

According to example embodiments, a load to be driven has a second part,which is rotatably mounted with respect to a first part of the load. Thehousing part has a first drilling pattern on a first outer side and afirst centering device, in particular a centering collar, a centeringedge, and/or a centering groove. The housing part has a second drillingpattern on a second outer side and a second centering device, inparticular a centering collar, a centering edge, and/or a centeringgroove. For example, the first and second outer sides are axially setapart from each other in relation to the axis of rotation of the outputshaft. The first and second drilling patterns are arranged in the samemanner, in particular in an identical manner, and/or the first and thesecond centering devices are arranged in the same manner, in particularin an identical, manner. For example, the first and second outer sideswith the first and the second drilling pattern are symmetrical inrelation to the plane of symmetry, in particular the plane. Optionally,the second part is able to be connected in a torsionally fixed manner tothe first axial end region of the hollow shaft, and the first part isable to be connected to the housing part at the first drilling patternand first centering device, or the second part is able to be connectedin a torsionally fixed manner to the second axial end region of thehollow shaft, and the first part is able to be connected to the housingpart at the second drilling pattern and second centering device.

This offers the advantage that a load of the same type may be connectedon both sides, that is to say, the A-side and/or the B-side, using thesame mechanical interface despite the asymmetrical configuration of thehousing part. The connection measurements, the drill holes of thedrilling pattern for connection screws, and the centering devices are ofthe same type on the output A-side and B-side.

According to example embodiments, the geared motor, which has a gearunit, in particular, a bevel gear, able to be driven by an electricmotor of the geared motor, has a housing part, which is produced by adie casting method, during or after which sliders are moved, inparticular pulled out, in the respective drawing directions for thedemolding, and an input shaft. The housing part has a channel, demoldedin a first drawing direction, in particular using a first slider, thechannel being arranged to extend through the wall of the housing andending in the interior space region of the gear unit, the drawingdirection having a non-vanishing angle in relation to the axis ofrotation of the input shaft, the angle in particular amounting tobetween 5° and 45°, in particular to between 5° and 20°.

This has the advantage that the ring gear meshing with the pinion of theinput shaft projects at least partially into the channel, in particularmore than half of the ring gear projecting into the channel. This makesit possible to provide the gear unit a very compact manner.

According to example embodiments, the gear unit is a bevel gear, and atooth system, in particular of a pinion, which is connected to the inputshaft in a torsionally fixed manner, meshes with the tooth system of aring gear, the ring gear being connected to a first intermediate shaftof the gear unit in a torsionally fixed manner. The orthogonalprojection of the axis of rotation of the first intermediate shaft ontothe drawing direction, in particular onto a plane including the drawingdirection, is included in the particular region that is covered by theorthogonal projection of the channel onto the drawing direction, inparticular onto the plane including the drawing direction. This has theadvantage that the ring gear projects into the channel by more thanhalf.

According to example embodiments, the inner diameter of the channel islarger than the largest outer diameter of the ring gear. This isconsidered advantageous insofar as the channel is wide enough to atleast partially accommodate the ring gear.

According to example embodiments, the housing part has a region which isdemolded in a second drawing direction, in particular using a secondslider, the second drawing direction having a non-vanishing angle to thenormal direction of the plane defined by the axis of rotation of theinput shaft and the axis of rotation of the first intermediate shaft,its amount in particular ranging from 5° to 45°, in particular from 5°to 20°. This has the advantage that the gear unit cover may be arrangedshorter, and the interior space region of the gear unit is able to havea smaller configuration so that less lubricating oil is required in thegear unit because the housing wall of the housing part extends closer tothe toothed parts.

According to example embodiments, the channel extends through a flangeregion of the gear unit, the gear unit, in particular, being connectedto the electric motor at the flange region. This offers the advantagethat the gear unit is fastened via the output-side flange region to anon-rotatably disposed region of the load to be driven, which means thatno foot areas are required and/or need to be machined. The flange regionon the output side thus also functions as a torque support.

According to example embodiments, the housing part is connected to agear unit cover, the connection surface having a planar configuration,the gear unit cover being connected to the housing part with the aid ofscrews, the connection surface being parallel to the axis of rotation ofthe input shaft and parallel to the axis of rotation of the intermediateshaft, the screws, in particular their helix axis direction, beingaligned in parallel with the second drawing direction, and a flat sealin particular being placed between the housing part and the gear unitcover. This has the advantage that the screws take up little space inthe wall of the housing part, or in other words, the wall thickness inthe region of the threaded bores in the housing part provided for thescrews is kept to a minimum. This is so because the drawing direction ofthe wall of the housing part is parallel with the helix axis directionof the screws. It is considered disadvantageous in this context that thescrews are not guided through the connection surface in a perpendicularmanner but the threaded bores have to be introduced into the housingpart at a corresponding angle in relation to the connection surface.

According to example embodiments, the screw is guided through arespective stepped bore of the gear unit cover and screwed into arespective threaded bore by its threaded region, the bore, in particularthe stepped bore, and the threaded bore being aligned in parallel withthe second drawing direction in each case, in particular, the screw headof the respective screw resting against the cover surface in a planarmanner, in particular against the step of the respective stepped bore.This offers the advantage that the stepped bore is also aligned inparallel with the drawing direction. When the bore is not implemented asa stepped bore, the screw head rests against the cover surface of thegear unit cover. When the bore is implemented as a stepped bore, on theother hand, the screw is provided with a countersunk screw head.

According to example embodiments, the bore, in particular the steppedbore, is introduced into a planar surface region of the gear unit cover,the normal direction of the planar surface region being aligned inparallel with the second drawing direction. This offers the advantagethat the bore implemented as a stepped bore is introduced perpendicularto the surface region.

According to example embodiments, the housing part has an asymmetricalconfiguration such that the particular plane whose normal direction isaligned in parallel with the axis of rotation of the first intermediateshaft and which includes the axis of rotation of the input shaft, is noplane of symmetry. This offers the advantage that material and interiorspace volume, that is to say, oil volume as well, is able to be saved onthe side of the plane facing away from the output wheel.

According to example embodiments, the housing part has an asymmetricalconfiguration such that the toothed part, in particular the gear wheel,which is connected to the output shaft of the gear unit in a torsionallyfixed manner, is set apart from the plane, in particular, a greatershare of the volume of the interior space region of the gear unit issituated on the side of the plane facing the toothed part than issituated on the side of the plane facing away from the toothed part.This is considered advantageous insofar as the housing part can bearranged so that the interior space region on the side facing away fromthe output wheel has a smaller volume than on the side of the planefacing the output wheel and/or than on the side of the plane includingthe output wheel.

According to example embodiments, the output shaft is situated so as tobe axially accessible from both sides, the output shaft in particularbeing arranged as a hollow shaft. This has the advantage that a shaft tobe driven is connectable, in particular insertable, on both sides. Theoutput shaft may also be arranged as a solid shaft.

According to example embodiments, the housing part is produced as analuminum die cast part. This has the advantage that the gear unit has alow mass and the motor therefore has to generate only a low holdingforce.

According to example embodiments, the housing part has the samemechanical interface for a load to be driven by the gear unit, inparticular by the output shaft, axially on both sides of the outputshaft. Thus, a first interface, in particular, is provided on thehousing part for the connection to a load to be driven by the frontaxial end region of the output shaft, and a second interface is providedon the housing part for the connection to a load to be driven by therear axial end region of the output shaft, the first interface and thesecond interface being identical. The interface includes a drillingpattern situated on the housing part and a centering means situated onthe housing part. This offers the advantage that the load to be drivenis axially connectable on both sides in the same manner. However, whenthe load is situated closer to the output wheel, higher transverseforces and bending moments are able to be absorbed than when the load issituated at a greater distance from the output wheel. This is so becauseon the side of the plane facing the output wheel, the housing wall issituated closer to the output wheel than the axially opposite housingwall is situated from the output wheel. The bearings of the output shaftaccommodated in the respective housing wall are therefore also situatedat a corresponding distance.

However, if the load on the side of the plane facing away from theoutput wheel is connected to the gear unit, the greater distance to theend wheel induces a higher torsion and greater elasticity at the outputshaft due to the greater axial length, and thus results in a less rigidconnection, which leads to a correspondingly different vibrationbehavior and to a different vibration tendency.

Further features and aspects of example embodiments of the presentinvention are described in greater detail below with reference to theappended schematic Figures.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a side view of a housing part 1 of a gear unit according to anexample embodiment of the present invention.

FIG. 2 is a cross-sectional view taken along lines A-A shown in FIG. 1.

FIG. 3 illustrates the housing part filled with toothed parts.

FIG. 4 is an associated rear view.

FIG. 5 indicates a cross-sectional line B-B.

FIG. 6 is a cross-sectional view taken along lines B-B.

FIG. 7 is an enlarged view from the connection region between a gearunit cover 70, placed on housing part 1, to housing part 1.

FIG. 8 is a perspective view of gear unit cover 70.

FIG. 9 is a perspective view of a flat seal 90, which is situatedbetween gear unit cover 70 and housing part 1.

FIG. 10 is an associated top view of flat seal 90.

FIG. 11 is a perspective view of the gear unit.

FIG. 12 is a perspective view from a different viewing direction.

FIG. 13 is a cross-sectional view through housing part 1 produced usingan oblique direction, a housing part which is produced without theoblique direction being indicated by dashed lines.

In addition to FIG. 13, FIG. 14 illustrates the orthogonal projection Dof the axis of rotation of the first intermediate shaft into a plane E,which includes the drawing direction of channel 2, and also theorthogonal projection (K1 to K2) of channel 2, so that it can beunderstood that D is included in of the projection of channel 2.

DETAILED DESCRIPTION

As schematically illustrated in the Figures, housing part 1, inparticular produced from aluminum by a die casting process, has achannel 2, which extends from the environment into the interior spaceregion of the gear unit. Channel 2 is the demolding region of a firstslider in the die cast production of housing part 1. As a result,channel 2 is a subregion of the particular space region required and/ortraversed by the first slider during the pull-out operation.

The drawing direction of the first slider, i.e., the channel direction,has a non-vanishing angle with respect to the input shaft of the gearunit. Therefore, the drawing direction does not extend in parallel withthe input shaft. The amount of this non-vanishing angle has a value ofbetween, e.g., 5° and 45°, and, for example, of between 5° and 20°.

During the die casting production, a second slider is pulled out in adrawing direction that has a non-vanishing angle to the particulardirection aligned orthogonal to the direction of the input shaft, inparticular to its axis of rotation, and orthogonal to the direction ofthe output shaft, in particular its axis of rotation.

Since the gear unit is a bevel gear, input shaft 20, in particular, itsaxis of rotation, is directed perpendicular to output shaft 5, inparticular, to its axis of rotation.

As mentioned above, the housing part has a region 10 that is demolded ina second drawing direction. The drawing direction of the second sliderthus has a non-vanishing angle to the particular direction that liesperpendicular to the axis of rotation direction of the input shaft andperpendicular to the axis of rotation direction of output shaft 5. Theamount of this non-vanishing angle has a value of between, e.g., 5° and45°, and, for example, of between 5° and 20°.

Connected to the input shaft in a torsionally fixed manner is a toothedpart, in particular a pinion, or as an alternative, a tooth system isarranged on the input shaft. Meshing therewith is a toothed part 21, inparticular a ring gear, which is situated on an intermediate shaft 20 ofthe gear unit in a torsionally fixed manner. This intermediate shaft 20is rotatably mounted with the aid of bearings, the bearings beingaccommodated in housing part 1. The bearing mounts of the bearings arecovered by a cover part 3, in particular, a cover cap in each case.Cover part 3 also provides oil-tight sealing from the environment.

As illustrated in FIG. 2, intermediate shaft 20 is connected in atorsionally fixed manner to tooth system 22.

The intermediate shaft also has a tooth system 22, which thus isconnected to intermediate shaft 20 in a torsionally fixed manner andmeshes with a tooth system or with a toothed part of a further shaft ofthe gear unit.

The input shaft projects into channel 2. The input shaft is connected ina torsionally fixed manner to the rotor shaft of the electric motor orarranged in one piece, i.e., in an integral fashion, with the rotorshaft of the electric motor.

As illustrated in FIG. 1, the orthogonal projection of the channel intoa plane including the drawing direction of the first slider includes theorthogonal projection of the axis of rotation of toothed part 21, inparticular, the ring gear. In particular, it includes more than half ofthe orthogonal projection of entire toothed part 21.

This is illustrated in FIG. 1 because the center point of sealing cap 3lies inside channel 2 rather than outside of it in an orthogonalprojection onto the edge of the channel. This is also illustrated by theorthogonal projection D in FIG. 14, which illustrates the projection ofthe center point into a plane E situated in parallel with the drawingdirection. This perpendicular projection (K1 to K2) is included by theorthogonal projection of channel 2.

Toothed part 21 thus projects into channel 2, or more specifically, morethan half of toothed part 21 projects into channel 2.

The likewise oblique drawing direction of the second slider makes itpossible to achieve a reduced oil volume because the wall of housingpart 1 is resting closer against the toothed parts than in the case ofdrawing directions of the sliders that are not slanted, that is to say,drawing directions of the sliders that are orthogonal with respect toone another.

Channel 2 penetrates flange region 6 and terminates in the environment.When the electric motor is installed, the opening produced in thismanner is sealed because the housing of the electric motor is connectedto flange region 6 of housing part 1, in particular by screws.

The gear unit is arranged without foot regions and the electric motor isheld via the connection between flange region 6 and the housing of theelectric motor. In an advantageous manner, this connection thus alsofunctions as a torque support for the motor. The gear-unit motor havingthe electric motor and gear unit is held via output-side flange region7, which is connected to a non-rotatably situated region of the load tobe driven.

FIG. 3 is a side view of the gear unit with gear unit cover 70 beinglifted. Toothed part 30, connected to a further intermediate shaft in atorsionally fixed manner, thus partially projects from the interiorspace region of the gear unit.

As illustrated in the rear view, i.e., top view with a viewing directioncounter to the input shaft, the gear unit has an asymmetricalconfiguration. This is because plane 42 whose normal direction isaligned in parallel with the axis of rotation of output shaft 5 andwhich includes the axis of rotation of the input shaft, is no plane ofsymmetry.

In FIG. 4, in particular, a larger share of the volume of the interiorspace region of the gear unit is located in region 40, that is to say,to the right of plane 42, rather than in region 41, i.e., to the left ofplane 42. The portion of the interior space region situated to the rightof plane 42 also accommodates the output wheel, i.e., the toothed partconnected to output shaft 5 in a torsionally fixed manner.

FIG. 5 illustrates the sectional line relevant for the cross-sectionaccording to FIG. 6. FIG. 6 illustrates that the output wheel issituated to the right of the plane. In the same manner, the intermediateshaft, covered by cover part 4, in particular, the sealing cap, in thedirection of the environment, is provided with a tooth system with whichthe output wheel meshes.

As illustrated, output shaft 5 is situated so as to be axiallyaccessible from both sides. Output shaft 5 is implemented as a hollowshaft, in particular.

Housing part 1 has an asymmetrical configuration such that the outputwheel is set apart from plane 42. As a result, more lubricating oil anda greater share of the interior space region of the gear unit issituated on the side of plane 42 facing the output wheel than issituated on the side of plane 42 facing away from output wheel.

As illustrated in FIG. 7, gear unit cover 70 is screwed to housing part1 with the aid of screws 71.

Since the wall thickness of the housing part is constant, in particular,in the vicinity of the contact region between housing part 1 and gearunit cover 70, the wall of housing part 1 extends in parallel with thedrawing direction.

Screws 71 are thus also aligned in parallel with this drawing direction.The normal direction of the planar connection surface between gear unitcover 70 and housing part 1 is therefore not aligned in parallel withthe helix axis of screws 71.

This ensures high stability and robustness of the gear unit. Inaddition, a flat seal 90 is interposed in the region of the connectionsurface, which is illustrated in FIGS. 9 and 10 in greater detail.

As illustrated in FIG. 7, the upper side of the gear unit cover has aplanar drilling surface region 72 into which an uninterrupted steppedbore is introduced so that screw 71 rests against the step of thestepped bore by its screw head and its threaded region is introducedinto a threaded bore of housing part 1. The threaded bore and the blindbore are aligned with each other and both are therefore aligned inparallel with the drawing direction of the second slider.

To produce the threaded bore, a wedge is placed under housing part 1 andthe threaded bore is then introduced into the connection surface. Thewedge angle of the wedge is similar to the angle of inclination and/orthe slant of the drawing direction of the second slider.

FIG. 8 is a perspective view of gear unit cover 70.

FIGS. 9 and 10 illustrate flat seal 90 together with uninterrupted,circular, i.e., in particular, cylindrical, recesses 91 through whichscrews 71 are guided when gear cover 70 is placed on housing part 1,despite the fact that screws 71 are aligned at an angle, i.e., have anon-vanishing angle to the normal direction of the connection surface.

FIGS. 11 and 12 illustrate the gear unit from different viewingdirections. Once again, the oblique alignment of the drawing directionof the first slider is illustrated along with the oblique alignment ofthe drawing direction of the second slider.

FIG. 13 is a cross-sectional view through the gear unit includinghousing part 1, the corresponding cross-section through another housingpart in whose production the drawing directions are not oblique but arealigned in parallel with one another or are aligned at an angle amountof 90° relative to one another.

In the exemplary embodiment illustrated in FIG. 13, the rotor shaft ofthe electric motor is arranged as input shaft 131, which is connected ina torsionally fixed manner to pinion 132, which meshes with ring gear 21of first intermediate shaft 20 of the gear unit.

The ring gear projects into channel 2. In particular, the orthogonalprojection of the axis of rotation of the ring gear clearly lies insidechannel 2, in particular, at the lower edge of channel 2.

Indicated by dashed lines 130 is an imaginary housing part without anoblique drawing direction. In comparison with imaginary housing part130, it is clear that housing cover 1 may be arranged in shortened form.The housing opening is kept as small as possible. Gear unit cover 70 mayhave a shorter configuration.

The arrangement of housing part 1 as an aluminum die cast componentresults in a reduced total weight in comparison with a configurationmade of steel.

A constriction 133 is present between gear unit cover 70 and flangeregion 6, which complicates or prevents varnishing in the dashedvariant. According to example embodiments of the present invention, orin other words, when using the oblique drawing directions, the clearancebetween flange region 6 and gear unit cover 70 is enlarged so that theconstriction does not constitute a risk but allows for easy varnishing.In addition, an accumulation of dirt at constriction 133 is made moredifficult and the cleaning is easier because more space is available.

The channel wall and the bearing seat, i.e., the input and outputregion, may have a reinforced form arranged as a result of the obliquedrawing directions hereof. This is considered particularly advantageousbecause the gear unit functions as a shaft-mounted gear unit, i.e., isheld by the non-rotatably situated region of a load to be driven by thegear unit.

A load to be driven is able to be axially connected on both sides on theoutput shaft. On the one hand, a torsionally fixed connection between arotating part, in particular, a solid shaft section, of the load to bedriven and the hollow shaft is to be implemented for this purpose. Inaddition, the non-rotatably situated region of the load to be drivenalso has to be connected to the housing part.

To this end, the same mechanical interface is provided on housing part 1axially on both sides. This interface has a centering device 9 such as acentering edge or centering collar on the one hand, and a drillingpattern for connection screws on the other hand. This interface issymmetrically aligned with plane 42 in FIG. 4, counter to the housingwall.

As a result, the load is connectable to housing part 1 using the samedrilling pattern, optionally coming axially from the front or comingaxially from behind.

Reference character D in FIG. 14 denotes the orthogonal projection ofthe axis of rotation of first intermediate shaft 20 into plane E;reference character E denotes the plane, in particular, a plane, that isaligned in parallel with the drawing direction of channel 2; referencecharacter K1 denotes the orthogonal projection of the outermost outletof channel 2 into the gear unit interior space; and reference characterK2 denotes the orthogonal projection of the outermost outlet of channel2 in the direction of the environment.

LIST OF REFERENCE CHARACTERS

-   1 housing part-   2 channel-   3 cover part, e.g., a sealing cap-   4 cover part, e.g., a sealing cap-   5 output shaft-   6 input-side flange region-   7 output-side flange region-   20 intermediate shaft-   21 toothed part, e.g., a ring gear-   22 tooth system-   30 further tooth part-   40 first region of housing part 1-   41 second region of housing part 1-   42 plane-   70 gear unit cover-   71 screw, e.g., a connection screw-   72 planar drill surface region-   90 flat seal-   91 recess-   130 imaginary housing part given a non-oblique drawing direction-   131 input shaft-   132 pinion-   133 region of the constriction-   D perpendicular projection of the axis of rotation of the first    intermediate shaft 20 into plane E-   E plane, e.g., a plane which is aligned in parallel with the drawing    direction of channel 2-   K1 perpendicular projection of the outermost outlet of channel 2    into the gear unit interior space-   K2 perpendicular projection of the outermost outlet of channel 2 in    the direction of the environment

The invention claimed is:
 1. A geared motor, comprising: a gear unitadapted to be driven by an electric motor and including a firstintermediate shaft rotatably mounted via bearings in a housing part, aninput shaft, and an output shaft, the gear unit including two connectionsurfaces set apart from each other and at which a device and/or amachine adapted to be driven by the gear unit is connectable to the gearunit, each of the two connection surfaces having a drilling pattern, thehousing part having an asymmetrical configuration such that a planewhose normal direction is aligned in parallel with an axis of rotationof the first intermediate shaft and includes an axis of rotation of theinput shaft, is not a plane of symmetry in relation to an entire outersurface of the housing part, is not a plane of symmetry in relation to ahousing wall of the housing part, and is a plane of symmetry withrespect to the two connection surfaces and the drilling patterns, theoutput shaft being arranged in parallel with the first intermediateshaft.
 2. The geared motor according to claim 1, wherein the gear unitis arranged as a bevel gear unit.
 3. The geared motor according to claim1, wherein the drilling pattern is adapted for connection screws forconnecting a respective device to the gear unit.
 4. The geared motoraccording to claim 1, wherein a load to be driven has a second partrotatably mounted with respect to a first part of the load, the housingpart having a first drilling pattern on a first outer side and a firstcentering device, the housing part having a second drilling pattern on asecond outer side and a second centering device, the first and secondouter sides being axially set apart from each other in relation to theaxis of rotation of the output shaft, the first and second drillingpatterns being of a same type and/or the first and second centeringdevices being of a same type, the first and second outer sides with thefirst and second drilling patterns being symmetrical in relation to theplane.
 5. The geared motor according to claim 4, wherein the firstcentering device and/or the second centering device includes a centeringcollar, a centering edge, and/or a centering groove.
 6. The geared motoraccording to claim 4, wherein the first and second drilling patterns areidentical.
 7. The geared motor according to claim 4, wherein the firstand second centering devices are identical.
 8. The geared motoraccording to claim 4, wherein (a) the second part is connectable to afirst axial end region of a hollow shaft in a torsionally fixed manner,and the first part is connectable to the housing part at the firstdrilling pattern and the first centering device and/or (b) the secondpart is connectable to a second axial end region of the hollow shaft ina torsionally fixed manner, and the first part is connectable to thehousing part at the second drilling pattern and the second centeringdevice.
 9. The geared motor according to claim 1, wherein the housingpart is asymmetrical such that a toothed part and/or a gear wheelconnected to the output shaft of the gear unit in a torsionally fixedmanner is set apart from the plane.
 10. The geared motor according toclaim 9, wherein a greater portion of a volume of an interior spaceregion of the gear unit is arranged on a side of the plane facing thetoothed part than is arranged on a side of the plane facing away fromthe toothed part.
 11. The geared motor according to claim 1, wherein theoutput shaft is axially accessible from both sides and/or projects fromthe housing part.
 12. The geared motor according to claim 1, wherein theoutput shaft is arranged as a hollow shaft.
 13. The geared motoraccording to claim 1, wherein the housing part is arranged as analuminum die cast part.
 14. The geared motor according to claim 1,wherein the housing part has a same mechanical interface for a load tobe driven by the gear unit axially on both sides of the output shaft.15. The geared motor according to claim 14, wherein the load to bedriven by the gear unit is to be driven by the output shaft.
 16. Thegeared motor according to claim 14, wherein a first interface isprovided on the housing part for connection to a load to be driven by afront axial end region of the output shaft, and a second interface isprovided on the housing part for connection to a load to be driven by arear axial end region of the output shaft, the first interface and thesecond interface being identical.
 17. The geared motor according toclaim 16, wherein the first and second interfaces are arrangedsymmetrical with the plane.
 18. The geared motor according to claim 14,wherein the interface includes a drilling pattern arranged on thehousing part and a centering device arranged on the housing part. 19.The geared motor according to claim 1, wherein the housing part isproduced by a pressure die casting method, during or after which slidersare moved and/or pulled out in respective drawing directions fordemolding, the housing part including a channel, demolded in a firstdrawing direction using a first slider, the channel extending through awall of the housing and ending in an interior space region of the gearunit, the drawing direction having an angle in relation to the axis ofrotation of the input shaft between 5° and 45°.
 20. The geared motoraccording to claim 19, wherein the gear unit is arranged as a bevelgear, a tooth system connected to the input shaft in a torsionally fixedmanner meshing with a tooth system of a ring gear, the ring gear beingconnected to a first intermediate shaft of the gear unit in atorsionally fixed manner, an orthogonal projection of an axis ofrotation of the first intermediate shaft onto a drawing direction and/oronto a plane including the drawing direction being included in a regioncovered by an orthogonal projection of the channel onto the drawingdirection and/or onto the plane including the drawing direction.
 21. Thegeared motor according to claim 19, wherein an inner diameter of thechannel is larger than a largest outer diameter of the ring gear. 22.The geared motor according to claim 19, wherein the housing part has aregion demolded in a second drawing direction, using a second slider,the second drawing direction having an angle to the normal direction ofthe plane defined by the axis of rotation of the input shaft and an axisof rotation of a first intermediate shaft ranging from 5° to 45°. 23.The geared motor according to claim 22, wherein the housing part isconnected to a gear unit cover, a connection surface having a planarconfiguration, the gear unit cover being screw-connected to the housingpart, the connection surface being parallel to the axis of rotation ofthe input shaft and parallel to the axis of rotation of the intermediateshaft, the screws and/or a helix axis direction of the screws beingaligned in parallel with the second drawing direction, a flat seal beingarranged between the housing part and the gear unit cover.
 24. Thegeared motor according to claim 19, wherein the channel extends througha flange region of the gear unit, the gear unit is connected to theelectric motor at the flange region, the gear unit holding the electricmotor.
 25. The geared motor according to claim 23, wherein a respectivescrew is arranged through a respective stepped bore of the gear unitcover and screwed into a respective threaded bore by a threaded region,the stepped bore and the threaded bore being aligned in parallel withthe second drawing direction, a screw head of the respective screwresting in a planar fashion against a cover surface and/or against astep of the respective stepped bore.
 26. The geared motor according toclaim 25, wherein the stepped bore is arranged in a planar surfaceregion of the gear unit cover, a normal direction of the planar surfaceregion being aligned in parallel with the second drawing direction. 27.The geared motor according to claim 19, wherein the housing part has aregion demolded in a second drawing direction, using a second slider,the second drawing direction having an angle to the normal direction ofthe plane defined by the axis of rotation of the input shaft and an axisof rotation of a first intermediate shaft ranging from 5° to 20°. 28.The geared motor according to claim 1, wherein the housing part isproduced by a pressure die casting method, during or after which slidersare moved and/or pulled out in respective drawing directions fordemolding, the housing part including a channel, demolded in a firstdrawing direction using a first slider, the channel extending through awall of the housing and ending in an interior space region of the gearunit, the drawing direction having an angle in relation to the axis ofrotation of the input shaft between 5° and 20°.